/*
 * Copyright (c) 2011, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the gradecalculator.net nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.gradecalculator.core.util;

import java.io.File;
import java.io.FilenameFilter;
import java.util.LinkedList;
import java.util.List;

import net.gradecalculator.core.interfaces.ICoreFactory;
import net.gradecalculator.plugin.loader.PluginLoader;

public final class CoreServiceProviderUtil {

	private static final String RESOURCE = "coreserviceprovider";

	private CoreServiceProviderUtil() {}

	public static List<ICoreFactory> getPlugins() {
		final LinkedList<ICoreFactory> result = new LinkedList<ICoreFactory>();

		final File importerDirectory = new File("plugins/core");
		final FilenameFilter filter = new FilenameFilter() {
			@Override
			public boolean accept(final File dir, final String name) {
				return name.endsWith(".jar");
			}
		};

		final File[] pluginlist = importerDirectory.listFiles(filter);
		if ((pluginlist == null) || (pluginlist.length == 0)) {
			return result;
		}
		for (final File pluginFile : pluginlist) {
			result.add((ICoreFactory) PluginLoader.getPluginByResource(pluginFile.getAbsolutePath(), RESOURCE));
		}

		return result;
	}
}
